防TTL值欺骗的数据包标记算法研究

分布式拒绝服务攻击是目前最难处理的网络难题之一,针对分布式拒绝服务攻击提出了多种应对方案,这些方案都各有优缺点,但其中自适应概率包标记受到了广泛地重视和运用。针对攻击者对TTL初始值的伪造提出了一种自适应策略,有利于防止TTL值的伪造,减少路由器处理器的负担,节省了IP包头的空间。     

快速卷装制袋机PLC控制技术应用

本文分析了快速卷装制袋机工作原理,研制出基于PLC技术的机床电器控制系统,并生产出的样机在实际中获得良好应用。     

半固态浆制备新技术——液相线铸造

制浆是半固态金属加工的关键环节。论述了半固态金属浆制备技术的发展与现状,提出了制浆新工艺-液相线铸造。通过对铝合金的试验研究表明,采用液相线铸造法可以获得均匀、细小的非枝晶,其晶粒尺寸小于50μm,该铸造组织经二次加热后完全转变为均匀、细小的等轴晶,是完全适合触变成型的理想的半固态组织。液相线铸造制浆技术具有工艺简单、投资省、生产效率高、适合大规模工业化生产等优点,尤其对变形铝合金半固态浆料的制备具有独特优势。     

制氢工艺改造的节能效果

介绍甲醇裂解制氢工艺特性,比较电解制氢和甲醇裂解制氢不同生产工艺电能消耗,分析节电机理,计算削峰能力,评价经济效果,为制氢生产企业提供典例。     

多方案DEMATEL的偏好交互与融合方法研究

为有效应对多方案DEMATEL在实际决策情景中涌现的个体选择偏好、流程导向偏好与交互学习偏好三者交互与融合问题,针对现有单方案方法在构造直接判断矩阵过程中忽视专家整体偏好一致性的不足,解析决策过程中三类偏好交互影响的系统复杂性,创新性地从偏好表征有效性、决策过程可控性及专家交互有序效性三个维度形成偏好交互与融合策略的整体思考。相对现有研究的贡献在于：关注多方案情景的多评价对象、多决策目标和多要素集合特征,依据整体决策信息判定策略和成对要素比较信息序列转换策略,创造性提出初始判断信息的整体判断偏好一致性检验方法和多轮次非一致性决策信息调整方案。针对某一众创空间内三个创业团队开展关键影响要素识别,实例验证结果表明上述所构建的方法和策略有效可行,能够形成更具参考价值的多方案对比分析结论,对响应复杂决策情景中的多主体、多层次、多偏好决策困境具有一定参考价值。     

科技期刊插图的制作技术

本文对计算机制作科技期刊插图的方法进行了分析,说明利用Photoshop、AutoCAD、PageMaker、CorelDRAW以及Word等几种软件制作插图的优缺点,并指出利用计算机制作插图存在的主要问题及其发展方向.     

模糊聚合算子在医疗诊断中的应用

模糊性是客观世界的固有属性。该文用Dubois的平均聚合算子M和Yager的有序权平均算子OWA来改进Sanchez和Umeyama的诊断模型,使结果更稳定。     

Risk assessment of China-Pakistan Fiber Optic Project (CPFOP) in the light of Multi-Criteria Decision Making (MCDM)

The China-Pakistan Economic Corridor (CPEC) is considered as an excellent breakthrough for improving the economic and security situation in the region. The estimated worth of CPEC is 62$ billion which is comprising of 49 developmental projects. China-Pakistan Fiber Optic Project (CPFOP) is one of the core projects among these, which will deliver safe route of voice traffic between both countries. CPFOP is greatly beneficial in terms of enhanced security and revenue generation. Currently, Pakistan’s international connectivity is via submarine cables. CPFOP will provide an alternative route for international telecom traffic and also assist in achieving the rapidly growing internet traffic demand in Pakistan. It is estimated that 17 million people will get benefit from this project. However, every project has some undesirable impacts. The aim of this research paper is twofold; 1st to trace out the pros and cons of CPFOP. 2ndly, performing a risk assessment of CPFOP by using Fuzzy VIKOR technique. This approach will help in prioritizing a list of failure modes of Fiber Optic Cable (FOC). Lastly, this paper will help authorities for optimizing and safeguarding national interest in the wake of CPFOP.     

改进三辊连轧技术提高钨钼线杆质量

全面系统地介绍了三辊Y型连轧技术的发展历史及其技术特点，详细阐述了我国钨钼线杆轧制生产线的技术现状，并根据几年来从事三辊Y型连轧技术研究和设备调试、生产的实践经验，指出生产线中存在的问题或不足之处，在综合分析的基础上提出相应的改进措施，并进行了成功的生产实践。     

Distributed computer system design: An interactive procedure

This paper presents an overview of an interactive system for the design of a distributed computer system. The system helps the designer in finding the optimal combination of processors of varying power to be located at various nodes of the system. It also helps in finding the optimal allocation of data files or databases. The system allows the designer to trade-off between the conflicting objectives: low investment and operating cost and high availability of data. Reasonable relative weights are assigned to each data file, and design objectives can be assigned priorities. A value added network such as TELENET is assumed for data communication. Also, multiple copies of the data file or database may exist in the system to achieve higher data availability and better response time.